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View north toward basalt dike (photograph EI10) in Hakatai Shale, Unkar Group, on north side of river mile 77.2, at beginning of Hance Rapids. Shinumo Sandstone forms cliff at upper edge of photograph.
View east and upriver toward Unkar Group of rocks, Cardenas Basalt sill (black), Bass Formation (light gray), Hakatai Shale (red), unconformably below overlying Cambrian Tapeats Sandstone, from south side of river mile 134.8.
Water quality in the Barnegat Bay estuary along the New Jersey coast is the focus of a multidisciplinary research project begun in 2011 by the U.S. Geological Survey (USGS) in cooperation with the New Jersey Department of Environmental Protection. This narrow estuary is the drainage for the Barnegat Bay watershed and flushed by just three inlets connecting it to the Atlantic Ocean, is experiencing degraded water quality, algal blooms, loss of seagrass, and increases in oxygen-depletion events. The scale of the estuary and the scope of the problems within it required a regional approach to understand and model water circulation within the bay and adjacent ocean. A continuous elevation surface (terrain model) integrating...
This data release contains the boundaries of assessment units and input data for the assessment of continuous oil and gas resources in the Delle Phosphatic Member of the Mississippian Woodman Formation, western Utah, eastern Nevada and southeastern Idaho. The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set of known or postulated oil and (or) gas accumulations sharing similar...
View east from Bass Trail across river toward Precambrian Wheeler Fold on north side of river mile 108.3. Mesoproterozoic rocks including Cardenas Basalt (black rock, lower right edge of photograph), Bass Formation (white strata, left side of photograph, Wheeler Fold, bottom center, and white ledges, base of upper cliffs), Hakatai Shale (brown cliff and upper gray ledges, upper center of photograph), and Shinumo Sandstone (brown cliff, upper edge of photograph).
Aerial view west toward landslide of Toroweap Formation (photograph EL18) on east side of Nankoweap Mesa, about 1 mile southwest of river mile 53.5.
View north from Esplanade Sandstone toward Forster Canyon breccia pipe (white bleached zone in Watahomigi and Manakacha Formations of Supai Group) in west wall of Forster Canyon, a half mile southwest of river mile 123.4.
Aerial view north towards Vulcans Throne volcano in distance on north side of river mile 179.3. View in foreground is north along Toroweap Fault in lower Prospect Canyon at faulted unnamed Pleistocene cinder cone and alluvium on east side of Prospect Canyon. Mount Trumbull (Pliocene basalt) on skyline, left side of photograph.
View southeast toward lower Supai village area of the Havasupai Reservation, from rim of Esplanade Sandstone, just south of Navajo Falls. Pliocene alluvial valley floor, Watahomigi Formation (lower slope), Manakacha Formation (large cliff), Wescogame Formation (upper slope and ledges), and Esplanade Sandstone cliff (forms inner canyon plateau).
Cave in Woods Ranch Member of Toroweap Formation, Marble Canyon, south side of Tanner Wash, southeast of river mile 14.6.
Aerial view northwest toward Horn Creek Rapids, river mile 90.9, showing numerous pegmatite and granite dikes in black Vishnu Schist. Inner canyon is 1,300 feet deep here.
View northeast toward Meriwhitica Springs on travertine flats of Meriwhitica Canyon and east wall of Spencer Canyon in background with unnamed Redwall Limestone buttes.
Aerial view north along Hurricane Fault in Two Hundred and Seventeen Mile canyon toward upper Granite Park Canyon. Redwall Limestone lower left of photograph and upper right of photograph.
View north toward Meriwhitica Monocline from trail in Meriwhitica Canyon, about 2 miles southwest of Meriwhitica Springs. Redwall Limestone is large upper gray cliff.
Calcite and other minerals in travertine vein that fills a fault plane in upper Diamond Creek canyon.
Aerial view west across Spencer Canyon toward Quaternary travertine dam in Meriwhitica Canyon (large gray cliff at canyon floor, middle part of photograph). Precambrian granite at Spencer Canyon bottom, Redwall Limestone at canyon rims.
View west toward east wall of Grand Canyon of contacts between Redwall Limestone (upper half of cliff), dark-gray Temple Butte Formation cliff, Cambrian unclassified dolomites, and Muav Limestone from river mile 266.0.
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